Several Issues/QUestions

I hope this is the correct forum, if not i apologize i tried searching through bugzilla and the forums but didn't quite find an answer to these questions

1) Tabbing between fields in the admin interface, and address book doesn't work, IT does work between fields in the calender, and compose.
Is this a bug or is it a restraint of ajax?

2) Open emails in new window
you can open a compose in a new window but not an email

3) is there anyway to add an audio alert for the appointment alerts, or will we have to use outlook for that feature?

4) is there a windows explorer shell addin "send this to mail recipient", or is it somthing that can be done? I know gmail has one for redirecting mailto: links to their client is this something similar